List of zip codes and their longitude/latitude?
February 18, 2004 11:47 AM   Subscribe

I've been charged with writing a program to find customers within a certain radius of a given zip code using their zip code. I was wondering if anyone could point me to a free list of zip codes as well as their latitude and longitude coordinates. [more inside]

Google seems to abound with results that will provide this for a fee, but I'm assuming (or hoping) that a free database exists somewhere. Please note that I am looking for a complete database, and not web-based applications into which you can input a single zip code and obtain the coordinates as output. Thank you very much in advance.
posted by alphanerd to Grab Bag (4 answers total) 1 user marked this as a favorite
Kevin Roth's Zip Code Search may be what you're looking for.

For reference, Google: "zip code" latitude longitude database. Sixth result is a discussion site called dBforums, wherein the author provides a link to his free db in response to a commercial announcement.
posted by Danelope at 12:09 PM on February 18, 2004

Response by poster: Wow, Danelope. This is pretty much everything I was looking for and includes some stuff I was planning on doing from scratch. Thanks a bunch.
posted by alphanerd at 12:30 PM on February 18, 2004

One caveat on zip code search tools: the database will get out-of-date quickly, especially if you allow for 9 digit searches. Not sure how much they want for a zip code subscription, but it might be worth it. It would appear the Zip Code Search files are from 2000 (the readme references this URL as a source.
posted by yerfatma at 1:00 PM on February 18, 2004

Josh Schachter (of GeoURL fame) has a "geowanking" list where they discuss questions just like this.
posted by adamrice at 1:53 PM on February 18, 2004

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